def _get_template_variable(self, name: str) -> str:
if name in self._template_variables:
return self._template_variables[name]
try:
cache = _TEMPLATE_VARIABLES[name](self)
except KeyError:
# name[0] should always be %.
lower_name = name[0] + french.lower_first_letter(name[1:])
if lower_name not in _TEMPLATE_VARIABLES:
logging.info('Wrong case in template variable "%s", cannot replace it.', name)
cache = name
else:
# Recursion cannot run in a loop thanks to the test just before.
cache = french.upper_first_letter(self._get_template_variable(lower_name))
self._template_variables[name] = cache
return cache
def test_one_letter(self) -> None:
"""Only one letter."""
sentence = french.upper_first_letter('t')
self.assertEqual('T', sentence)
def test_all_lowercase(self) -> None:
"""All upper case."""
sentence = french.upper_first_letter('this is all lowercase')
self.assertEqual('This is all lowercase', sentence)
def test_all_uppercase(self) -> None:
"""All upper case."""
sentence = french.upper_first_letter('THIS IS ALL UPPERCASE')
self.assertEqual('THIS IS ALL UPPERCASE', sentence)
def test_empty(self) -> None:
"""Empty string."""
sentence = french.upper_first_letter('')
self.assertEqual('', sentence)
